300 Amp Cable Size at 5 Meters (24V DC (Off-Grid Solar / Industrial Control))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 300 A over 5 m (16.4 ft).
Copper Cable (≤3% Drop)150 mm²Drop: 0.43V (1.78%)
Aluminum Cable (≤3% Drop)240 mm²Drop: 0.44V (1.84%)
Voltage at Load23.6 VLine Loss: 128.4 W
Max Power & Breaker7.2 kW300A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A at 5m
| Cross-Section (mm²) | Cu Ampacity | Al Ampacity | Cu Voltage Drop | Load Voltage | Al Voltage Drop | Power Loss | Status |
|---|---|---|---|---|---|---|---|
| 1.5 mm² | 16 A | 12 A | 42.8 V (178.33%) | 0.0 V | 70.6 V (294.17%) | 12840.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 25.68 V (107.0%) | 0.0 V | 42.36 V (176.5%) | 7704.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 16.05 V (66.88%) | 7.9 V | 26.47 V (110.31%) | 4815.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 10.7 V (44.58%) | 13.3 V | 17.65 V (73.54%) | 3210.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 6.42 V (26.75%) | 17.6 V | 10.59 V (44.12%) | 1926.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 4.01 V (16.72%) | 20.0 V | 6.62 V (27.58%) | 1203.8 W | Drop High |
| 25 mm² | 101 A | 78 A | 2.57 V (10.7%) | 21.4 V | 4.24 V (17.65%) | 770.4 W | Drop High |
| 35 mm² | 125 A | 97 A | 1.83 V (7.64%) | 22.2 V | 3.03 V (12.61%) | 550.3 W | Drop High |
| 50 mm² | 151 A | 118 A | 1.28 V (5.35%) | 22.7 V | 2.12 V (8.82%) | 385.2 W | Drop High |
| 70 mm² | 192 A | 150 A | 0.92 V (3.82%) | 23.1 V | 1.51 V (6.3%) | 275.1 W | Drop High |
| 95 mm² | 232 A | 181 A | 0.68 V (2.82%) | 23.3 V | 1.11 V (4.64%) | 202.7 W | Drop High |
| 120 mm² | 269 A | 210 A | 0.54 V (2.23%) | 23.5 V | 0.88 V (3.68%) | 160.5 W | Drop High |
| 150 mm² | 309 A | 241 A | 0.43 V (1.78%) | 23.6 V | 0.71 V (2.94%) | 128.4 W | ✓ OK (≤3%) |
| 185 mm² | 353 A | 275 A | 0.35 V (1.45%) | 23.7 V | 0.57 V (2.39%) | 104.1 W | ✓ OK (≤3%) |
| 240 mm² | 415 A | 324 A | 0.27 V (1.11%) | 23.7 V | 0.44 V (1.84%) | 80.2 W | ✓ OK (≤3%) |
| 300 mm² | 477 A | 372 A | 0.21 V (0.89%) | 23.8 V | 0.35 V (1.47%) | 64.2 W | ✓ OK (≤3%) |
| 400 mm² | 570 A | 445 A | 0.16 V (0.67%) | 23.8 V | 0.26 V (1.1%) | 48.1 W | ✓ OK (≤3%) |
FAQ — 300 Amp Cable Size at 5 Meters (24V DC (Off-Grid Solar / Industrial Control))
What mm² cable size is required for 300A at 5 meters (24V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 150 mm² copper cable for 300A over 5m at 24V (voltage drop: 0.43V or 1.78%).
What is the power capacity of 300A at 24V?
At unity power factor, 300A at 24V supports 7.2 kW with a standard 300A circuit breaker.
Related Lengths & Currents (24V)
300A · 10m (24V)300A · 15m (24V)300A · 20m (24V)300A · 25m (24V)300A · 30m (24V)300A · 35m (24V)300A · 40m (24V)300A · 45m (24V)300A · 50m (24V)300A · 60m (24V)300A · 70m (24V)10A · 5m (24V)16A · 5m (24V)20A · 5m (24V)25A · 5m (24V)32A · 5m (24V)40A · 5m (24V)50A · 5m (24V)63A · 5m (24V)80A · 5m (24V)100A · 5m (24V)125A · 5m (24V)160A · 5m (24V)200A · 5m (24V)